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Molecular Simulation Results on Charged Carbon Nanotube Forest-Based Supercapacitors

Journal Article · · ChemSusChem
 [1];  [1];  [2];  [3];  [3]
  1. Tulane Univ., New Orleans, LA (United States). Dept. of Chemical and Biomolecular Engineering
  2. Elizabethtown College, PA (United States). Dept. of Chemistry and Biochemistry
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Biological and Engineering Sciences

In this paper, electrochemical double-layer capacitances of charged carbon nanotube (CNT) forests with tetraethyl ammonium tetrafluoro borate electrolyte in propylene carbonate are studied on the basis of molecular dynamics simulation. Direct molecular simulation of the filling of pore spaces of the forest is feasible even with realistic, small CNT spacings. The numerical solution of the Poisson equation based on the extracted average charge densities then yields a regular experimental dependence on the width of the pore spaces, in contrast to the anomalous pattern observed in experiments on other carbon materials and also in simulations on planar slot-like pores. The capacitances obtained have realistic magnitudes but are insensitive to electric potential differences between the electrodes in this model. This agrees with previous calculations on CNT forest supercapacitors, but not with experiments which have suggested electrochemical doping for these systems. Finally, those phenomena remain for further theory/modeling work.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Tulane Univ., New Orleans, LA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Science (SC); SNL Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
NA0003525; AC02-05CH11231
OSTI ID:
1474079
Report Number(s):
SAND--2018-10191J; 667946
Journal Information:
ChemSusChem, Journal Name: ChemSusChem Journal Issue: 12 Vol. 11; ISSN 1864-5631
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

References (37)

A Review of Graphene-Based Electrochemical Microsupercapacitors journal November 2013
GROMACS: Fast, flexible, and free journal January 2005
Assessment of Simple Models for Molecular Simulation of Ethylene Carbonate and Propylene Carbonate as Solvents for Electrolyte Solutions book January 2018
Assessment of Simple Models for Molecular Simulation of Ethylene Carbonate and Propylene Carbonate as Solvents for Electrolyte Solutions journal February 2018
Electrochemical doping of single-walled carbon nanotubes in double layer capacitors studied by in situ Raman spectroscopy journal January 2009
Electrochemical doping of pure single-walled carbon nanotubes used as supercapacitor electrodes journal November 2008
Dielectric Relaxation of Ethylene Carbonate and Propylene Carbonate from Molecular Dynamics Simulations journal November 2015
Molecular Insights into the Complex Relationship between Capacitance and Pore Morphology in Nanoporous Carbon-based Supercapacitors journal December 2016
Capacitive Energy Storage in Nanostructured Carbon–Electrolyte Systems journal June 2012
Curvature Effect on the Capacitance of Electric Double Layers at Ionic Liquid/Onion-Like Carbon Interfaces journal February 2012
Molecular Simulation of Electric Double-Layer Capacitors Based on Carbon Nanotube Forests journal September 2009
Development and Testing of the OPLS All-Atom Force Field on Conformational Energetics and Properties of Organic Liquids journal January 1996
Molecular Insights into Carbon Nanotube Supercapacitors: Capacitance Independent of Voltage and Temperature journal April 2013
Microstructure and Capacitance of the Electrical Double Layers at the Interface of Ionic Liquids and Planar Electrodes journal February 2009
Supercapacitor Capacitance Exhibits Oscillatory Behavior as a Function of Nanopore Size journal October 2011
Voltage Dependent Charge Storage Modes and Capacity in Subnanometer Pores journal June 2012
Oscillation of Capacitance inside Nanopores journal December 2011
Shape-engineerable and highly densely packed single-walled carbon nanotubes and their application as super-capacitor electrodes journal November 2006
Materials for electrochemical capacitors journal November 2008
Molecular Insights into Aqueous NaCl Electrolytes Confined within Vertically-oriented Graphenes journal October 2015
Graphene-based materials for flexible supercapacitors journal January 2015
Carbon materials for supercapacitor application journal January 2007
Carbon-based materials as supercapacitor electrodes journal January 2009
Capacitance in carbon pores of 0.7 to 15 nm: a regular pattern journal January 2011
A superionic state in nano-porous double-layer capacitors: insights from Monte Carlo simulations journal January 2011
A review of molecular modelling of electric double layer capacitors journal January 2014
Polymorphic transitions in single crystals: A new molecular dynamics method journal December 1981
Interfaces of propylene carbonate journal March 2013
Evaluation of the constant potential method in simulating electric double-layer capacitors journal November 2014
A molecular dynamics method for simulations in the canonical ensemble journal January 2002
A molecular dynamics method for simulations in the canonical ensemble journal June 1984
Canonical dynamics: Equilibrium phase-space distributions journal March 1985
Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer journal September 2006
AIMD Results for a Concentrated Solution of Tetra-ethylammonium Tetra-fluoroborate in Propylene Carbonate journal July 2015
Curvature effects in carbon nanomaterials: Exohedral versus endohedral supercapacitors journal August 2010
Evaluation of Constant Potential Method in Simulating Electric Double-Layer Capacitors text January 2014
Supercapacitors using Pure Single-walled Carbon Nanotubes journal June 2009

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